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Chignell CF, Weber WW. Application of Physicochemical and Analytic Techniques to the Study of Drug Interactions with Biological Systems. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/10408447209103466] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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2
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Rane SS, Anderson BD. What determines drug solubility in lipid vehicles: is it predictable? Adv Drug Deliv Rev 2008; 60:638-56. [PMID: 18089295 DOI: 10.1016/j.addr.2007.10.015] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2007] [Accepted: 10/14/2007] [Indexed: 10/22/2022]
Abstract
Lipid-based drug delivery systems are of increasing interest to the pharmaceutical scientist because of their potential to solubilize drug molecules that may be otherwise difficult to develop. The ability to predict lipid solubility is an important step in being able to identify the right excipients to solubilize and formulate drugs in lipid formulations. However, predicting lipid solubility is complicated by the fact that interfacial effects may play a dominant role in these mixtures and the solubility may be affected by the microstructure (microemulsions, emulsions, oily solutions, etc.), as well as by the physicochemical properties of the oil, surfactant, co-solvent, and the drug. This review illustrates the fundamental factors that govern solubility in lipid mixtures and discusses models built at varying levels of sophistication to estimate the solubility. Examples from the literature are presented that demonstrate the application of these models, how their choice is related to the drug/lipid employed, and the challenges involved in solubility prediction. New data on the role water plays in altering lipid solubility, not only through its interaction with the solute, but also by changing the structure of lipids by promoting lipid organization are highlighted. The available data demonstrate that a rational understanding of solubilization in lipids is a worthwhile pursuit and models to predict at least the relative solubility from chemical structure have potential. Prediction of absolute solubility is more difficult as it requires knowledge of the drug's escaping tendency from the crystalline state. In recent years, it has become amply clear that for polar solutes, specific interactions are a critical factor governing solubility. Methods that can better take into account the specific as well as non-specific interactions between the solute and solvent, and the lipid microstructure, hold considerable promise for the future.
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Kim SH. Three-dimensional structure of transfer RNA and its functional implications. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 46:279-315. [PMID: 205095 DOI: 10.1002/9780470122914.ch4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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4
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Granick S, Beale SI. Hemes, chlorophylls, and related compounds: biosynthesis and metabolic regulation. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 46:33-203. [PMID: 345768 DOI: 10.1002/9780470122914.ch2] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Ise T, Shiomi D, Sato K, Takui T. Watson–Crick pairing of nucleobases functionalized with open-shell molecular entities in crystalline solids. Chem Commun (Camb) 2006:4832-4. [PMID: 17345744 DOI: 10.1039/b611236f] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Watson-Crick type molecular complex of adenine and thymine bases substituted with the stable radical of nitronylnitroxide has been synthesized, which forms a double-chain spin system in the crystal.
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Affiliation(s)
- Tomoaki Ise
- Department of Materials Science and Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
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Yamamoto I. [Studies on the structure-activity relationship of allyl substituted oxopyrimidines searching for the novel antagonist or agonist of barbiturates to the sleep mechanism based on the uridine receptor theory--barbituric acid to uridine (part I)]. YAKUGAKU ZASSHI 2005; 125:73-120. [PMID: 15635282 DOI: 10.1248/yakushi.125.73] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Thirty-six allyl substituted oxopyrimidine analogues such as barbituric acid (BA), barbiturates, uracil, thymine, and related derivatives including 13 new compounds were synthesized and their pharmacologic effects ([hypnotic activity, anticonvulsant activity against pentylentetrazol (PTZ)-induced seizures, and LD(50)]) and interactions with the barbiturates were evaluated in mice and rats. The results are briefly and parially summarized as follows. BA prolonged pentobarbital (PB)-induced sleep and had some central depressant effects. N,5,5-triallyl-BA exhibited some hypnotic and anticonvulsant activities, although the other 5,N-allyl-compounds did not show any activity except for allobarbital (AlloB). N-allyl-BA, 5-allyl-BA, N(1),N(3),5-triallyl-BA, N,5,5-triallyl-BA, and N(1),N(3),5,5-tetraallyl-BA also prolonged PB-induced sleep. Interestingly, N,5,5-triallyl-BA was the most potent in the interaction with AlloB, phenobarbital (PheB), amobarbital (AB), PB, and thiopental (TP) but not barbital (B). N(1),N(3),5,5-tetraallyl-BA prolonged AlloB-, PB-, and AB-induced sleep but not B-, PheB-, and TP-induced sleep. N(1),N(3),5-triallyl-B prolonged only PB- and TP-induced sleep. 5,5-diallyl-BA prolonged PheB- and TP-induced sleep. N,5-diallyl-BA prolonged only TP-induced sleep. In contrast, BA and N(1),N(3),5-triallyl-AB tended to antagonize AlloB, AB, and B. N(1),N(3),5,5-tetraallyl-BA also slightly antagonized B, PheB, and TP. 5,5-diallyl-BA antagonized only AB. The prolonging effects of BA, N,5,5-triallyl-BA, and N(1),N(3),5,5-tetraallyl-BA on PB-induced sleep were dose dependent. These results indicate that the position and number of allyl groups substituted on the structure of BA play an important role in their depressant activities. This review deals with the structure-activity relationship of allyl-substituted oxopyrimidines as part of our search for antagonists and agonists of barbiturates as well as their mechanisms of action.
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Affiliation(s)
- Ikuo Yamamoto
- Faculty of Pharmaceutical Sciences, Hokuriku University, Kanazawa 920-1181, Japan.
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Castellano RK, Gramlich V, Diederich F. Rebek imides and their adenine complexes: preferences for Hoogsteen binding in the solid state and in solution. Chemistry 2002; 8:118-29. [PMID: 11822445 DOI: 10.1002/1521-3765(20020104)8:1<118::aid-chem118>3.0.co;2-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Rebek imides (3), formed from Kemp's triacid, were developed in the mid-1980's as model receptors for adenine derivatives. We report here the first account of their hydrogen-bonding preferences upon binding 9-ethyladenine (1a) in the solid state. Structural analysis begins with simple imides 3a-e that form discrete dimers, while bis-imide 4 forms ribbon-like structures in the crystalline phase. The hydrogen-bonding interface within each of the representative assemblies features short intermolecular N(3)imide...O(8*)imide* distances (ca. 2.95 A), indicative of two-point hydrogen bonding. Imides 3f-h could be co-crystallized with 1a; single-crystal X-ray analysis of the resulting complexes reveals hydrogen-bonding geometries nearly identical to those observed in nucleobase complexes of adenine and pyrimidine derivatives. Imides 3f and 3g form 2:1 ternary assemblies with 1a; the complex of the former, (3f)2 x 1a, displays both Watson-Crick- and Hoogsteen-type hydrogen bonding, whereas the complex of the latter, (3g)2 x 1a, shows the Hoogsteen motif and imide hydrogen bonding to N(3) of the purine base (N(3)adenine...N(3'')imide = 3.07(1) A). Imide 3h forms a 1:1 complex with 1a (3h x 1a x CHCl3) and displays Hoogsteen binding exclusively. All of the 3 x 1a assemblies show C(adenine)...O(imide) distances (3.38-3.75 A) that are consistent with C-H...O hydrogen bonding. Base-pairing preferences for the Rebek imides are further explored in solution by 1H NMR one-dimensional NOE experiments and by computational means; in all cases the Hoogsteen motif is modestly favored relative to its Watson-Crick counterpart.
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Camerman A, Mastropaolo D, Hempel A, Camerman N. Hydrogen bonding interaction of diphenylbarbituric acid and 9-ethyladenine. Crystal structure of a 1:1 complex. CAN J CHEM 2000. [DOI: 10.1139/v00-102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
There are several different types of adenosine receptors found in the brain and molecules capable of interacting with the adenine ring system may have an effect on brain activity. Phenobarbital and diphenylhydantoin, two commonly used antiepileptic drugs have been shown to form hydrogen bonded complexes with adenine derivatives. Although 5,5-diphenylbarbituric acid has anticonvulsant properties equivalent to phenobarbital, neither its structure nor possible interactions with adenine have been investigated. 5,5-Diphenylbarbituric acid and 9-ethyladenine were, therefore, cocrystallized and the three-dimensional 1:1 hydrogen bonded complex was determined by X-ray diffraction. The crystals are monoclinic, C2/c, a = 28.457(9), b = 10.633(3), c = 13.995(4) Å, β = 100.20(2)°, Z = 8, R = 0.067 for 1680 reflections with I > 3σ(I). The molecules propagate along the b crystallographic axis in an alternating fashion in which adjacent adenine and barbiturate molecules interact through a pair of hydrogen bonds. Two-fold symmetry related barbiturate carbonyl groups in neighboring planes of hydrogen bonded ribbons are involved in dipoledipole attractive interactions. This hydrogen bonding pattern is compared to patterns found in other barbiturateadenine complexes.Key words: hydrogen bonding, crystal structure, barbiturates, adenine, anticonvulsants.
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Camaioni E, Costanzi S, Vittori S, Volpini R, Klotz KN, Cristalli G. New substituted 9-alkylpurines as adenosine receptor ligands. Bioorg Med Chem 1998; 6:523-33. [PMID: 9629466 DOI: 10.1016/s0968-0896(98)00007-8] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the present study an investigation of the structure-activity relationships in 9-ethylpurine derivatives, aimed at preparing A1, A2A, A2B, and A3 selective adenosine receptor antagonists, was undertaken. Our synthetic approach was to introduce various substituents (amino, alkoxy and alkynyl groups) into the 2-, 6-, or 8-positions of the purine ring. The starting compounds for each series of derivatives were respectively: 2-iodo-9-ethyladenine (9), obtained from 2-amino-6-chloropurine (5); 9-ethyl-6-iodo-9H-purine (11), 8-bromo-9-ethyl-adenine (3) and 8-bromo-9-ethyl-6-iodo-9H-purine (13), obtained from 9-ethyl-adenine (2). The synthesized compounds were tested in in vitro radioligand binding assays at A1, A2A, and A3 human adenosine receptor subtypes. Due to the lack of a suitable radioligand the affinity of the 9-ethyladenine derivatives at A2B adenosine receptors was determined in adenylyl cyclase experiments. In general, the series of 9-ethylpurine derivatives exhibited a similar pharmacological profile at A1 and A2A receptors whereas some differences were found for the A3 and the A2B subtypes. 8-Bromo-9-ethyladenine (3) showed higher affinity for all receptors in comparison to the parent compound 2, and the highest affinity in the series for the A2A and A2B subtypes (Ki = 0.052 and 0.84 microM, respectively). Analyzing the different substituents, a phenethoxy group in 2-position (10a) gave the highest A2A versus A2B selectivity (near 400-fold), whereas a phenethylamino group in 2- and 6-position (10b and 12b, respectively) improved the affinity at A2B receptors, compared to the parent compound 2. The presence of a hexynyl substituent in 8-position led to a compound with good affinity at the A3 receptor (4d, Ki = 0.62 microM), whereas (ar)alkynyl groups are detrimental for the potency at the A2B subtype. These differences give raise to the hope that further modifications will result in the development of currently unavailable leads with good affinity and selectivity for A2B adenosine receptors.
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Affiliation(s)
- E Camaioni
- Dipartimento di Scienze Chimiche, Università di Camerino, Italy
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Structures and energies of seleno derivatives of biuret.Ab Initio comparative studies of diselenobiuret, selenobiuret, and selenothiobiuret. Struct Chem 1997. [DOI: 10.1007/bf02252968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Paleos CM, Sideratou Z, Tsiourvas D. Mixed Vesicles of Didodecyldimethylammonium Bromide with Recognizable Moieties at the Interface. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp961424b] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. M. Paleos
- Institute of Physical Chemistry, NCSR “Demokritos”, 15310 Aghia Paraskevi Attikis, Athens, Greece
| | - Z. Sideratou
- Institute of Physical Chemistry, NCSR “Demokritos”, 15310 Aghia Paraskevi Attikis, Athens, Greece
| | - D. Tsiourvas
- Institute of Physical Chemistry, NCSR “Demokritos”, 15310 Aghia Paraskevi Attikis, Athens, Greece
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Saxena AK, Saxena M. Developments in anticonvulsants. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 1995; 44:185-291. [PMID: 7644666 DOI: 10.1007/978-3-0348-7161-7_6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- A K Saxena
- Division of Medicinal Chemistry, Central Drug Research Institute, Lucknow, India
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Honda Y, Kurihara K, Kunitake T. Molecular Recognition of Barbiturates by Diaminotriazine Functionalized Monolayers. CHEM LETT 1991. [DOI: 10.1246/cl.1991.681] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Poltev VI, Shulyupina NV. Simulation of interactions between nucleic acid bases by refined atom-atom potential functions. J Biomol Struct Dyn 1986; 3:739-65. [PMID: 3271047 DOI: 10.1080/07391102.1986.10508459] [Citation(s) in RCA: 107] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Energy of interaction between nitrogen bases of nucleic acid has been calculated as a function of parameters determining the mutual position of two bases. Refined atom-atom potential functions are suggested. These functions contain terms proportional to the first (electrostatics), sixth (or tenth for the atoms forming a hydrogen bond) and twelfth (repulsion of all atoms) powers of interatomic distance. Calculations have shown that there are two groups of minima of the base interaction energy. The minima of the first group correspond to coplanar arrangement of the base pairs and hydrogen bond formation. The minima of the second group correspond to the position of bases one above the other in almost parallel planes. There are 28 energy minima corresponding to the formation of coplanar pairs with two (three for the G:C pair) almost linear N-H . . . O and (or) N-H . . . N hydrogen bonds. The position of nitrogen bases paired by two such H-bonds in any crystal of nucleic acid component in polynucleotide complexes and in tRNA is close to the position in one of these minima. Besides, for each pair there are energy minima corresponding to the formation of a single N-H . . . O or N-H . . . N and one C-H . . . O or C-H . . . N hydrogen bond. The form of potential surface in the vicinity of minima has been characterized. The results of calculations agree with the experimental data and with more rigorous calculations based on quantum-mechanical approach.
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Affiliation(s)
- V I Poltev
- Institute of Biological Physics, USSR Academy of Sciences, Moscow Region
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Ishida T, Inoue M, Senda S, Tomita KI. Structural Studies of the Interaction between Indole Derivatives and Biologically Important Aromatic Compounds. IV. The Crystal and Molecular Structure of Tryptamine: Adenin-9-ylacetic Acid (1 : 1) Hemihydrate Complex. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1979. [DOI: 10.1246/bcsj.52.2953] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
The prediction of a strong hydrogen-bonding interaction between barbital and 1-methylimidazole was confirmed. Two crystal complexes were obtained, 1:1 and 2:1, and the X-ray structure was determined for the 1:1 complex, which is monoclinic, space group P21/c, with a = 12.236(3) A, b = 11.332(4) A, c = 12.495(4) A, and beta = 120.67(1) degrees. The structure contains disk-shaped hydrogen-bonded tetramers with two molecules of each kind. There is a short NH...N hydrogen bond (2.82 A) in which barbiturate provides the NH donor.
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Fiser PS, MacPherson JW, Reinhart BS. The effect of sodium pentobarbital on the fertility of fowl spermatozoa. Poult Sci 1978; 57:1761-3. [PMID: 751052 DOI: 10.3382/ps.0571761] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The effect of three levels of sodium pentobarbital in modified glycine-citrate extender on the preservation of the fertilizing capacity of fowl spermatozoa was tested. Extended semen samples were stored for 24 and 48 hr at 2 C before insemination. Insemination with semen stored for 24 hr in the extender containing 120 mg of sodium pentobarbital provided the best results (73.9%).
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Fujii S, Fujiwara T, Tomita K. Structural studies on the two forms of 8-bromo-2',3'-O-isopropylideneadenosine. Nucleic Acids Res 1976; 3:1985-96. [PMID: 967683 PMCID: PMC343054 DOI: 10.1093/nar/3.8.1985] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The crystal and molecular structures of two forms of 8-bromo-2',3'-O-isopropylideneadenosine have been determined by X-ray methods. In one form, the molecular structure has planar conformation in the sugar moiety and no intramolecular hydrogen bond. On the other hand, the molecular structure of the second form has C(2')-endo conformation and an intramolecular hydrogen bond. No stacking interaction between adjacent bases is found in either form, but two modes of the base-pairing hydrogen bond exist in the second form.
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Kim SH. Three-dimensional structure of transfer RNA. PROGRESS IN NUCLEIC ACID RESEARCH AND MOLECULAR BIOLOGY 1976; 17:181-216. [PMID: 778921 DOI: 10.1016/s0079-6603(08)60070-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kim SH, Suddath FL, Quigley GJ, McPherson A, Sussman JL, Wang AH, Seeman NC, Rich A. Three-dimensional tertiary structure of yeast phenylalanine transfer RNA. Science 1974; 185:435-40. [PMID: 4601792 DOI: 10.1126/science.185.4149.435] [Citation(s) in RCA: 644] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The 3-angstrom electron density map of crystalline yeast phenylalanine transfer RNA has provided us with a complete three-dimensional model which defines the positions of all of the nucleotide residues in the moleclule. The overall features of the molecule are virtually the same as those seen at a resolution of 4 angstroms except that many additional details of tertiary structure are now visualized. Ten types of hydrogen bonding are identified which define the specificity of tertiary interactions. The molecule is also stabilized by considerable stacking of the planar purines and pyrimidines. This tertiary structure explains, in a simple and direct fashion, chemical modification studies of transfer RNA. Since most of the tertiary interactions involve nucleotides which are common to all transfer RNA 's, it is likely that this three-dimensional structure provides a basic pattern of folding which may help to clarify the three-dimensional structure of all transfer RNA's.
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Tamura C, Sato S, Hata T. Studies on Intermolecular Complex Formation. IV. Crystal Structure of Cytosine-Resorcylic acid 2:1 Complex monohydrate. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1973. [DOI: 10.1246/bcsj.46.2388] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chandross R, Rich A. The crystal structure of the 2:1 intermolecular complex containing 1-melhyl-5-flourouracil and 9-ethyl-2,6-diaminopurine. Biopolymers 1971. [DOI: 10.1002/bip.360101005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Tamura C, Sakurai N, Sato S. Studies on Intermolecular Complex Formation. I. Between Nucleotide Bases and Organic Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1971. [DOI: 10.1246/bcsj.44.1473] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bugg CE, Thomas JM, Sundaralingam M, Rao ST. Stereochemistry of nucleic acids and their constituents. X. Solid-state base-stacking patterns in nucleic acid constituents and polynucleotides. Biopolymers 1971; 10:175-219. [PMID: 5544940 DOI: 10.1002/bip.360100113] [Citation(s) in RCA: 214] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Craven BM, Gartland GL. Molecular association of barbital and caffeine in 2:1 crystalline complex. J Pharm Sci 1970; 59:1666-70. [PMID: 5495500 DOI: 10.1002/jps.2600591130] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Voet D, Rich A. The crystal structures of purines, pyrimidines and their intermolecular complexes. PROGRESS IN NUCLEIC ACID RESEARCH AND MOLECULAR BIOLOGY 1970; 10:183-265. [PMID: 4910304 DOI: 10.1016/s0079-6603(08)60565-6] [Citation(s) in RCA: 278] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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